<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		#root{
			height: 100px;
			width:100px;
			border:1px solid #000;
			border-radius: 5px; 
		}
	</style>
</head>
<body>
	<div id="root"></div>
</body>
</html>